Throttle valve control



May 23, 1933. A. H BRiNKMANN ET AL ,910,744

THRQTTLE VALVE CONTROL I Filed. May 24, 1932 2 Sheets-Sheet l 1 l Z4 6 C m 3 6e. I] Y Y I J /5 /0 z a: q 9 X 3X 4 v! Lu ATTORNE s.

y 23, 1933- A. H. BRINKMANN ET AL ,7

THROTTLE VALVE C ONTROL Filed May 24, 1932 2 Sheets-Sheet 2 Patented May 23, 1933 UNITED sTA Tas PATENT OFFICE r AUGUST H. BRINKMANN AND GEORGE HERBERT RICE, JR OF CATONSVILLE,

MARYLAND, ASSIGNORS ONE-FIFTH TO EMIL GATHMANN, OI BALTIMORE,

MARYLAND THROTTLE VALVE CONTROL Application filed Kay 24,

This invention relates to throttle valve controls and more particularly to control means for as and air throttle valves of internal com ustion engines. Our invention provides improved control means adapted to maintain a throttle valve either in a par tially open position for-idling of the motor, or in a substantially fully closed position when the motor-is being driven from an out- 0 side source; such as, by the driving wheels ferred to are shown for example in the patent to August H. Brinkmann 1,553,025, granted September 8, 1925. The present invention provides improved means for. effecting the desired control and which is more efiicient in operation than that shown in the 8 patent referred to. i

One object of the present invention is to provide a control means of the general nature set forth above characterized by the fact that, upon adjustment of the control means from a position for maintaining the throttle valve partially open to a position for maintaining the valve substantially fully closed, the valve will automatically be moved to the fully closed position.

Another object is to provide the intake pipe or manifold of an engine equipped with such control means with means for preventing an excessive degree of vacuums existing in the manifold or pipe when the throttle valve is in fully closed position, thereby preventing oil pumping in the engine cylinders. Other objects are to provide novel constructional arrangements whose practical advantages will appear from a reading of the following description, the appended claims, and the accompanying drawings, in, which:

Figure 1 is a somewhat diagrammatic view in side elevation of a vehicle engine parts 1932. Serial I'm-618,818.

owing certain parts in different posiiglure 3 IS a view similar to Figure 2,

on the line 66 of Figure 1 and drawn on an enlarged scale;

Figure 7 is a view in side elevation of a fuel intake pipe showing a modified form of control means applied thereto;

Figure 8 is a'view in front elevation takenat right angles to Figure 7;

Figure 9 is a fragmentary horizontal sectional View taken on the line 9-9 of Figure Figure 10 is a view similarto Figure 7 but showing a modified form of control means;

Figure 11 is a view taken at right angles to Figure 10;

Figure 12 is but showing a invention; and

Figure 13 is a View taken at right angles to Figure12. v

The invention is illustrated in the accompanying drawings as being applied to an internal combustion engine A of a vehicle having a' chassis land floor board 2, these being shown in conventional arrangement. The engine includes an intake pipe or manifold 3 and carburetor 4 connected to the manifold 3 by means of a vertically extending connection 5, which in effect comprises part of the intake manifold or pipe. A throttle valve 6 of the butterfly type is mounted on a horizontal rock shaft 7, journa-led at 8 in the connection 5, this arrangement of butterfly valve being conventional and well known. An operating arm 9 is secured to the rock shaft 7 and a push rod a View similar to Figure 7, further modification of the 10 is pivotally connected to the end of the arm 9 and extends through the floor board 2, being provided at its inner end with an accelerator pedal 11. A spring 12 connected at its oppositeends to a clip 13, secured to the push rod 10 and to an eye 14, anchored in the floor board, urges the push rod 10 to the right, and consequently tends to rock'the' shaft 7 in a counter clockwise direction so as to move the valve 6 towards its Figure 3 or closed position. As is understood, to effect opening of the valve 6, the accelerator pedal 11 is depressed.

Integral with the arm 9 is an arm 15 formed with a lateral extension 16, carrying an adjusting screw 17 held in adjusted position by means of a .lock nut 18. As will be described later, the screw 17 is adapted to I abut against either a movable stop for maintaining'the valve 6 in partially open position or against a fixed stop for maintaining the valve in substantially, fully closed position.

So far, the valve mechanism and the operating means therefor only have been described. These parts are the same in all of the several embodiments of the invention disclosed herein, and the foregoing description will be understood to apply to these parts in the embodiment shown in Figures 15, inclusive; the embodiment in Figures 79, inclusive; the embodiment shown in Figures 10 and 11; and the embodiment shown in Figures 12 and 13.

Referring now to the control means for maintaining the valve 6 in either its fully closed or partially open position, shown in Figures 1-5, the intake'pipe section 5 is provided with a boss 19 which is threaded for the reception of a threaded end portion of a pintle 20 which serves pivotally to mount a lever 21, the latter comprising a cylindrical hub 22 and an arm 23. The hub 22 is formed with a cut out or depression 24, the purpose of which, will be described later. A spring 25, interposed between a fixed lug 26 and the lower end of the arm 23 constantly urges the lever 21 to its Figure 2 position, movement of the lever in this direction being limited by a stop pin 27. A link 28 is connected at one of its ends to the arm 23 and at its other end is connected to one arm of a bell crank lever 29 pivoted on a. bracket 30 secured to the floor board, the other arm of the bell crank lever being connected to a push rod 31 extending through the floor board.

In operation, the spring 25 normally will maintain the lever 21 in the Figure 2 position, in which the cylindrical surface portion of the hub 22 will lie in the path of the inner end of the screw 17. The screw contacting with the cylindrical surface portion of the hub, will limit closing movement of the valve 6 under the urge of the spring 12 so that the valve will be maintained in partially open position, providing for idling of the motor. If the vehicle encounters a down grade and it is desired to prevent fuel from being drawn into the engine cylinders and also to utilize the compression in the cylinders to effect braking, the push rod 31 will be depressed momentarily. This will effect rocking of the lever 21 in a counter clockwise direction so as to move it to the position shown in Figure 3, wherein the cut out portion 24 will be positioned in the path of the screw 17. This will permit the spring 12 to rock the arm 9 and valve 6 further in a counter clockwise direction so as to bring the valve to its fully closed position as shown in Figure 3. It will be noted that in order to effect movement of the valve to its fully closed position, it is necessary only to actuate the push rod 31in the manner described, after which the valve automatically will assume its Figure 3 position, no operation of the accelerator being necessary. When it is desired to reopen the valve, it is necessary only to depress the accelerator. When the screw 17 has been moved clear of the short side of the cut out 24, the spring 25 will return the lever 21 to its Fi ure 2 position wherein the cylindrical surf ace portion of the hub 22 acts as a stop for maintaining the valve in idling position.

The adjusting screw 17 may be so positioned relative to the arm 15 as to vary the partially open or idling position of the valve in accordance with the idling speed desired.

In the embodiment of the invention shown in Figures'7, 8 and 9, a fixed stop post 32 is carried by the pipe section 5 and is disposed in the path of the adjusting screw 17 for maintaining the valve 6 in. its closed position when the screw 17 engages the stop post 32. A bracket 32 is secured to the pipe section 5 as at 33 and is formed with a upper horizontal leg 34. A movable stop member 35 is mounted on the bracket in a manner permitting its being swung into an operative position. between the stop 32 and the screw 17 As shown, the stop member 35 includes a baseportion 36 which is pivoted on a vertical pin 37 secured to the leg 34 of the supporting bracket, and a vertically extending portion 38 adapted to be positioned in the path of the screw 17. A spring 39, connected to the vertically extending portion 38, urges the latter into engagement with the stop post 32 and between the latter and the screw 17. A link 40, likewise connected to the vertically extending v portion of the stop member 35, is adapted to be connected to operating means, such as the bell crank lever 29, shown in Figure 1, for

swinging the stop member 35 in a counter and 9, wherein the vertically extending portion 38 cooperates with the screw 17 to maintain the valve in partially open or idling position. If it is desired that the valve be moved to and maintained in its fully closed position, the link 40 is moved to the left as viewed in Figure 8, so as to swing the vertically extending portion 38 out of engagement with the screw 17, afterwhich the spring 12 will move the arm 9 and valve 6 towards the closed position of the latter and movement thereof. will be arrested by engagement of the screw 17 with the stop post 32. As in the case of the apparatus shown in Figures 1-5, inclusive, movement of the valve to its fully closed position is efl'ected in the apparatus shown in Figures 7, 8 and 9 merely by actuating the link 40 momentarily. Also themstop mechanism will be set for maintaining the valve in its idling position by depressing the accelerator pedal without its being necessary to operate the stop member 35. I

Referring nowto the embodiment illustrated in Figures 10 and 11 a stop post 41, carried by the pipe section 5,is arranged a to cooperate with the screw 17 for maintaining the valve in its fully closed position. A solenoid 42 is mounted on the lower flange of the pipe section 5 and is adapted to be energized by a battery, indicated conventionally at 43, under the control of a switch 44. A plunger 45 is mounted for vertical movement within the solenoid and is formed with a flattened upper end 46, providing a resultant shoulder 47 whichcoopcrates with the stop post 41 for limiting upward movement of the plunger under the urge of a spring 48.

In operation, the plunger 45 normally will be maintained in its upper position by the. spring 48, so that the flattened upper end will be disposed in the path of the screw 17 and will cooperate with the latter to maintain the valve in its partially open or idling position. When it is desired that the valve 6 be moved to its fully closed position under the urge of the spring 12, the solenoid 42 is energized momentarily, thus moving the plunger 45 downwardly out of engagement with the screw 17 which thereafter will move against the fixed stop 41. The parts will remain in this position until the arm 15has been rocked to the left to move the inner end part of the screw 17 clear of the top of the plunger 45 after which the spring 48 will return the latter to its upper position.

Referring to Figures 12 and 13, the'modi fication illustrated includes a fixed stop post '65 49 carried by the pipe section 5 and disposed in the ath of the screw 17 for cooperation wit the latter to maintain the valve in its fully closed position. A cylinder 50'is mounted on the lower flange of the pipe section; 5 and a piston 51, mounted in the cylinder, is urged upwardly by means of a spring 52. The piston is provided with a stem 53, having a flat upper end portion 54, forming a resultant shoulder 54", adapted to engage the stop post 49 for limiting upward movement of the stem 53. A

pipe 55 is adapted to afford communication between the interior of the ipe section 5 and the lower end of the cylinder 50, this communication being controlled by a valve 56 having an operating arm 57, arranged to move the valve to its closedposition under the urge of a spring 58, connected to the arm 57 and to a fixed bracket 59. A link 60 is adapted to be connected to operating means such as the bell crank lever 29 of Figure 1 for moving the valve to open position.

In operation, normally the parts. are in the position shown in' Figures 12 and 13, wherein the valve 56 is closed and the piston 51 and stem 53 are in their u per positions. In this position of the stem, t e flat portion 54 thereof willcooperate with the adjusting screw 17 for maintaining the valve 6 in its partially open position. When it is desired that the valve 6 be moved to its fully closed position, the link 60 is operated momentarily to open the'valve 56, placing the lower end of the cylinder 50 in communication with the intake manifold. This will result in the creation of a partial vacuum in the cylinder 50, it being understood that there is, during operation, a partial vacuum in the intake manifold, and the piston 51 will move downwardlythereby withdrawing the flat portion 54 of the stem from engagement with the screw 17 after which the valve will be moved to its fully closed position with the screw 17 in engagement with the stop post 49.. Even though the valve 56 has been opened momentarily to cause the piston 51 to move downwardly, the latter will be maintaine in its lower position by engagement of the top of the stem 53 with the lower side of the screw 17. Movement of the screw to the left during subsequent opening movement of the valve will release the stem 53 and the latter will be returned to its Figure 12 and Figure 13 position by the spring 52.

It will be observed that in each form of may provide means for limiting the degree of vacuum which can exist inthe intake manifold and cylinders when the vehicle is coasting down grade. As shown in Figure 6, this means comprises a pressure responsive check valve 61, including a valve body 62 extending through the intake manifold wall, a movable valve element 63 and a spring 64 for normally maintaining the movable element 63 seated. If the vehicle is descending a steep grade and the valve 6 is in its fully closed position, there will be a tendency for a high degree of vacuum to be created in the intake manifold and cylinder which would be objectionable because of the likelihood of oil pumping under such a condition. The valve 61 is operable to place the interior of the intake manifold in communication with the atmosphere when a predetermined degree of vacuum exists in the manifold, so as to prevent the vacuum from becoming too great, it being under stood that the spring 64 may be so adjusted thatthe valve will open automatically uponthe creation of any predetermined degree of vacuum.

It is apparent that our invention provides control means for easily setting a throttle to either fully closed or partially open, i. e. idling position. An important one of the several advantages to be noted from the foregoing disclosure is that the arrangement is such that in order to effect setting of the throttle valve to its fully closed position only a single momentary operation is necessary, namely actuating of the movable stop. The desired adjustment may therefore be effected more easily than with constructions ond stop mounted for movements from an inoperative position to an operative position in engagement with said member for positioning said valve in partially open position; a spring for urging said second stop to operative position; and electro-magnetic means for moving said second stop to operative position against the urge of said spring.

3. he combination with a throttle valve; of a rock shaft for mounting the valve; means for rocking the shaft; a stop arm secured to said shaft; means for urging said shaft and valve to closed position; a fixed stop disposed in the path of said stop arm and cooperating with the latter to position said shaft and valve in substantially fully closed position; a second stop mounted on a pivotat right angles to said rock shaft and bein movable about said pivot into and out of t e path of said stop arm; means for urging said second stop toward a position in the path of said arm; and means for moving said second stop out of the path of said arm.

In testimony whereof, we have hereunto subscribed our names.

AUGUST H. BRINKMANN. GEORGE HERBERT RICE, JR.

- in which, after operating the-movable stop,

it is necessary additionally to move the control valve itself. It will be understood that the'embodiments of the invention disclosed herein are to betaken as illustrative of the invention andfthat-various changes may be made without departing from the spirit of the invention as defined in the claims.

We claim:

1. The combination with a throttle valve; of an operating member connected to the valve; a fixed stop adapted to cooperate with said member for positioning the valve in substantially .full closed position; a second stop mounted or movements from an inoperative position to an operative position inengagement with said member for positioning said valve in partially open position; a pressure responsive piston connected to said second stop; a cylinder in which said piston is operable; and means for changing the pressure in said cylinder for effecting operation of said second stop.

2. The combination with a throttle valve; of an operating member connected to the valve; a fixed sto adapted to cooperate with said member or positioning the valve in substantially fully closed position; a sec- 

